From: Vignesh Raghavendra <vigneshr@ti.com>
Date: Mon, 9 Dec 2019 04:55:35 +0000 (+0530)
Subject: dma: ti: k3-udma: Remove coherency check for cache ops
X-Git-Tag: v2020.10~405^2~48
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=c0b9490304eaa0adddaf83a32f2118d5951bb6bd;p=platform%2Fkernel%2Fu-boot.git

dma: ti: k3-udma: Remove coherency check for cache ops

Remove redundant coherency checks before calling cache ops in UDMA
driver. This is now handled in arch specific cache operation
implementation based on Kconfig option

Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Grygorii Strashko <grygorii.strashko@ti.com>
Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
---

diff --git a/drivers/dma/ti/k3-udma.c b/drivers/dma/ti/k3-udma.c
index 605ac06..a22f98d 100644
--- a/drivers/dma/ti/k3-udma.c
+++ b/drivers/dma/ti/k3-udma.c
@@ -113,7 +113,6 @@ struct udma_dev {
 	u32 psil_base;
 
 	u32 ch_count;
-	bool is_coherent;
 };
 
 struct udma_chan {
@@ -296,11 +295,6 @@ static inline bool udma_is_chan_running(struct udma_chan *uc)
 	return false;
 }
 
-static int udma_is_coherent(struct udma_chan *uc)
-{
-	return uc->ud->is_coherent;
-}
-
 static int udma_pop_from_ring(struct udma_chan *uc, dma_addr_t *addr)
 {
 	struct k3_nav_ring *ring = NULL;
@@ -1327,7 +1321,6 @@ static int udma_probe(struct udevice *dev)
 		return ret;
 	}
 
-	ud->is_coherent = dev_read_bool(dev, "dma-coherent");
 	tisci_rm->tisci_udmap_ops = &tisci_rm->tisci->ops.rm_udmap_ops;
 	tisci_rm->tisci_psil_ops = &tisci_rm->tisci->ops.rm_psil_ops;
 
@@ -1475,11 +1468,9 @@ static int *udma_prep_dma_memcpy(struct udma_chan *uc, dma_addr_t dest,
 
 	cppi5_tr_csf_set(&tr_req[num_tr - 1].flags, CPPI5_TR_CSF_EOP);
 
-	if (!udma_is_coherent(uc)) {
-		flush_dcache_range((u64)tr_desc,
-				   ALIGN((u64)tr_desc + desc_size,
-					 ARCH_DMA_MINALIGN));
-	}
+	flush_dcache_range((u64)tr_desc,
+			   ALIGN((u64)tr_desc + desc_size,
+				 ARCH_DMA_MINALIGN));
 
 	k3_nav_ringacc_ring_push(uc->tchan->t_ring, &tr_desc);
 
@@ -1649,14 +1640,12 @@ static int udma_send(struct dma *dma, void *src, size_t len, void *metadata)
 	cppi5_hdesc_set_pkttype(desc_tx, packet_data.pkt_type);
 	cppi5_desc_set_tags_ids(&desc_tx->hdr, 0, packet_data.dest_tag);
 
-	if (!udma_is_coherent(uc)) {
-		flush_dcache_range((u64)dma_src,
-				   ALIGN((u64)dma_src + len,
-					 ARCH_DMA_MINALIGN));
-		flush_dcache_range((u64)desc_tx,
-				   ALIGN((u64)desc_tx + uc->hdesc_size,
-					 ARCH_DMA_MINALIGN));
-	}
+	flush_dcache_range((u64)dma_src,
+			   ALIGN((u64)dma_src + len,
+				 ARCH_DMA_MINALIGN));
+	flush_dcache_range((u64)desc_tx,
+			   ALIGN((u64)desc_tx + uc->hdesc_size,
+				 ARCH_DMA_MINALIGN));
 
 	ret = k3_nav_ringacc_ring_push(uc->tchan->t_ring, &uc->desc_tx);
 	if (ret) {
@@ -1700,19 +1689,15 @@ static int udma_receive(struct dma *dma, void **dst, void *metadata)
 	}
 
 	/* invalidate cache data */
-	if (!udma_is_coherent(uc)) {
-		invalidate_dcache_range((ulong)desc_rx,
-					(ulong)(desc_rx + uc->hdesc_size));
-	}
+	invalidate_dcache_range((ulong)desc_rx,
+				(ulong)(desc_rx + uc->hdesc_size));
 
 	cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len);
 	pkt_len = cppi5_hdesc_get_pktlen(desc_rx);
 
 	/* invalidate cache data */
-	if (!udma_is_coherent(uc)) {
-		invalidate_dcache_range((ulong)buf_dma,
-					(ulong)(buf_dma + buf_dma_len));
-	}
+	invalidate_dcache_range((ulong)buf_dma,
+				(ulong)(buf_dma + buf_dma_len));
 
 	cppi5_desc_get_tags_ids(&desc_rx->hdr, &port_id, NULL);
 
@@ -1817,11 +1802,9 @@ int udma_prepare_rcv_buf(struct dma *dma, void *dst, size_t size)
 	cppi5_hdesc_set_pktlen(desc_rx, size);
 	cppi5_hdesc_attach_buf(desc_rx, dma_dst, size, dma_dst, size);
 
-	if (!udma_is_coherent(uc)) {
-		flush_dcache_range((u64)desc_rx,
-				   ALIGN((u64)desc_rx + uc->hdesc_size,
-					 ARCH_DMA_MINALIGN));
-	}
+	flush_dcache_range((u64)desc_rx,
+			   ALIGN((u64)desc_rx + uc->hdesc_size,
+				 ARCH_DMA_MINALIGN));
 
 	k3_nav_ringacc_ring_push(uc->rchan->fd_ring, &desc_rx);